4 doctors weighed in

They are both as good or as bad -- they are acting locally in the bowel to bind the fat and cholesterol and theoretically reduce the absorption of fat and thus reduce the level of cholesterol in the blood.

In brief:
Neither --

They are both as good or as bad -- they are acting locally in the bowel to bind the fat and cholesterol and theoretically reduce the absorption of fat and thus reduce the level of cholesterol in the blood.
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